LTE eNB Functions
According to the 3GPP Release 8 overview, the eNB hosts the following functions within an LTE network:
- Radio Resource Management
- Radio Bearer Control
- Radio Admission Control
- Connection Mobility Control
- Dynamic allocation of resources to UEs in both uplink and downlink (scheduling)
- IP header compression and encryption of user data stream
- Selection of an MME at UE attachment when no routing to an MME can be determined from the information provided by the UE
- Routing of User Plane data towards Serving Gateway
- Scheduling and transmission of paging messages (originated from the MME)
- Scheduling and transmission of broadcast information (originated from the MME or O&M)
- Measurement and measurement reporting configuration for mobility and scheduling
Figure 1 : Functional Split Between E-UTRAN and EPC
